Ishiya had a lot more sense and was managing to remain calm, she would be a good addition, while the other had a fair bit of energy, which had its own uses. He decided. What he was about to do would be considered cruel to most, as he dropped back to all fours and slowly made his way over to Ishiya. He smelled her hair a bit before muttering, "Yes, you'll do." Before either sister could say or do anything, Isaac's jaws where clamped onto Ishiya's shoulder and collarbone, his teeth breaking the skin and keeping hold for a moment before he released her. First would be the pain, then the sensation of something spreading through her body under her skin, then would come her first change. The first change is always excruciating, with the next several being painful as well until they were used to it.

Isaac moved over towards Jatheia next, and let her watch what would be her sister's turning. Once the change was well underway, he'd bite her as well. He got rid of the bonds of Ishiya, as restraining her during the change would be troublesome.